General Knowledge - Physics - Discussion

CORRECT OPTION is option (A) not (B)
We know
A and -A are unequal vectors, they give zero resultant when added.
hence minimum number of vectors is 2

Answer is Three

One is obviously out. Two is out because if two unequal forces n and p act on an object the resultant with the minimum force in magnitude is |n - p|, which will never be 0 if n =/= p.

Three can be easily resolved with a quick example. Imagine an object with three concurrent forces acting on it.

Two forces, n = 3 N and p = 4 N, create an angle with eachother such that the resultant is 5 N. 180 degrees from the resultant, a force, r = 5 N, is acting on the object.

Thus three unequal vectors on an object can result in 0.

Yes in case of b two vectors combine with each other to give a resultant vector which is equal and opposite to third vector.

2 vectors can never give zero resultant but 3 vectors will give it, e.g let vectors N and P with value 4 and 6 move rightward while vector T with value 10 moves leftward. Therefore, there resultant is zero (0).

It is simply understandable that two vectors of equal magnitude and opposite direction give O. Hence the answer is two.

Read the question carefully, they said unequal vectors. So all three are unequal in magnitude. Three is the answer means option B.

Three is the right answer because there is a unequal vector, two unequal vectors can not solve this.

Two vectors never give zero.

But in the case of three, it is possible.

Consider two unequal vectors are placed on two sides of a triangle then it gives the resultant third side so it can never be zero, but if we place another vector as the third side of the triangle then the resultant will be zero.

The Correct option is three. I agree.

Aren't two vectors unequal if their direction is different but same magnitude?